Problem description: 
LibreOffice will become unresponding, I waited 1/2 hour before I terminated the process. Problem is limited to Conditional Formatting, no problem when paste cell contents or formatting. 

Steps to reproduce:
1. From Start Screen open empty new Calc Document
2. click cell A1 so that cell cursor is at A1
3. Apply conditional formatting to cell A1 by menu
   {Format ► Conditional Formatting ► Condition 1:  
   "Cell Value is" ► "Equal to": type "1" ► Apply Style "Result"
    ► Add}
   Dialog will disappear
4. <cntrl+c> for "Copy"  (cell cursor still is on A1)
5. Click Column Heading "A" to select all column
6. menu {Edit ► Paste Special ► All Checkboxes unchecked except
   "Formatting" ► OK}

Current behavior:
LibreOffice will become unresponding

Expected behavior:
Conditional Formatting applied to all cells within very few seconds.

This is a rather annoying problem because I often want to apply a Conditional Formatting to a complete column.

The problem is not limited to that special condition or other special conditions, the hang always comes up when I paste conditional formatting to very many cells like a complete column.

Not a problem with paste contents or formatting to all cells of a column, that always is done after few (2-4) seconds.

My suspect is that LibreOffice does not really hang, but paste Conditional Formatting works so slowly that the operation takes too long for normal work.

AOO does the job within a second, so the problem might be related to the advanced LibreOffice Conditional Formatting capabilities?
Operating System: Windows 7
Version: 4.2.5.2 release